Shimano 105 FC-5800 Road Bike Chainset - Black
Shimano 105 FC-5800 Road Bike Chainset - Black
Code: FC5800-B
Shimano 105 5800 chainset – black. Options: Crank Lengths 165mm, 170mm, 172.5mm, 175mm Ring Sizes 34/50, 36/52, 39/53


The Shimano 5800 has gone 11 Speed for the latest incarnation of the 105. The 5800 has been inspired by the innovations of the more upper end Shimano Ultegra and Dura Ace; you can see the technological influences across the design of the 5800 components.  More advanced and lighter than its predecessors and with a more eye catching design, the 5800 promises high performance and is one of the latest cycling must haves. 



  • Lightweight HollowTech II 105 11-speed chainset
  • Innovative HollowTech forged and anodised aluminium crank arms utilise a hollow design that minimises flex and keeps the weight low
  • The chainring teeth have been developed to work in conjunction with HG-X 11-speed chains for increased contact to provide greater efficiency and improved power transfer
  • HollowTech II allows the bottom bracket bearings to be spaced wider apart, enabling the use of larger bearings and an increased axle diameter
  • Can be used with Shimano external or press-fit bottom brackets
  • The system allows for easier installation, adjustment, and maintenance
  • Lightweight anodised SG-X aluminium chainrings for smooth and precise shifting
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Works superb at great price from Merlin. Needed a climbing chainset so got this.... I'd recommend this for anyone in need of efficient chainset on a budget.
I bought this chainset to help me in riding the local Darling Ranges. I also have the Ultegra compact chainset on another bike so it was interesting to compare the two. The Ultegra is a 2009 model and has been as smooth as ever since I purchased it. I have been reading the very positive reviews of the 105 groupset components so thought I would give it a go. I must say that I am very impressed with the quality and weight of this chainset. The changes from one chainring to the other are very smooth and I honestly cannot tell the difference between my old Ultegra and this new 105. It is black in colour and looks very sexy on my bike.
The 105 5800 series is such a step-up for Shimano, there is very little difference from ultegra. Have upgraded crankset/chainset on a few of my bikes from stock to 105 and can tell the difference....lighter, smoother, value out there.
Performs as good as Ultegra while costing much less.. what's not to like? Best value for money groupset in the market.
This is the first crank-arm I have purchased and boy was I missing out. I recently upgraded from a 2x9 to a 2x11 and my first ride out knocked my socks off. What a difference this baby made! This crank-arm is light, sturdy and delivers. Ordering was easy and it was placed on my doorstep before I expected it. You too will not be disappointed.
I purchased this chainset to match the rest of my bike's equipment (and to release the chainset on that bike for another project). What's to say?... It's well made, easy to install, and so far has given trouble free riding... Everything you'd expect from Shimano. The price was the best I saw, and the postage was quick too. Very pleased.
The standard bearer of excellent value. Works great, looks great, killer price.
Very nice from Shimano as per usual. I have the 6800 crank on another bike and this is just as smooth with the dreaded upshift.
Having just upgraded to this crank which is running on a 105 5700 10 speed group set, I can say it works absolutely fine. In comparison to the standard comp 1 crank my bike came with from factory, this crank feels so much smoother when shifting in between gears. More importantly it feels stiffer and allows for accurate power delivery. Really glad with this upgrade and would highly recommend this to those who are in the market to upgrade their cranks. Great customer service from Merlin.
Feels light and I feel very little flex even when out of the saddle. Decent value as usual with 105.
Running on 105 5700 10 Speed groupset. Works perfectly. Upgraded from the non series R500 crankset and gives a far more positive and smoother shift. Can't tell if its any stiffer but there again I'm no pro! Great value and looks fantastic and not forgetting, great customer service from Merlin as always.
A solid crankest that was an exceptional value. Feels great under power and while climbing. It improved the chain line as well as the function of the front derailleur compared to the OEM FSA crankset.
This chainset which takes it's design cues from the higher end Dura Ace and Ultegra sets really is a thing of beauty. Lightweight, extremely well made, stiff and shifts like a dream. I can't see how much of an improvement the higher end stuff will give other than weight to be honest. Works perfectly fine with 10 speed too. Bargain!
Light and stiff. Feels miles better than my old Sora set.
I am very impressed with the upgrade from 5700 to 5800. I was not a fan of the 5700 chainset look. The 5800 performs great, it's very stiff and it looks great!
52T 36T is a nice mix for the chainset. They fitted up easily as long as you have the correct spline tool.